Ejktvelof-making- machine



H. Y. ARMSTRONG.

ENvELoP MAKING MACHINE.

APPucmoN man sm. 1. 19u.

Patented Dec. 16, 1919.

5 SHEETS-SHEET I.

H. Y. ARMSTRONG.

l my' Patented Deo. 16,1919.

5 SHEETS-SHEET 2.

H. Y. ARMSTRONG.

ENVELOP MAKING MACHINE.

APPLICATION FILED SEPT. I. 1911.

1 ,325,3 1 1. Patented DecQlG, 1919.

5 SHEETS-SHEET 3.

OJ D I? ...u

Qi I w." ..0 I@ A 'N A ITN I L N' @N N NN N H. Y. ARMSTRONG. l

ENVELOP MAKING MACHINE.

APPucATxoN FILED SEPT. I. lsu.

Patented Dee. 16, 1919.

. 5 SHEETS-SHEET 4.

H.Y.ARMSTR'0NG ENVELOP MAKING MACHINE.

APPLICATION FILED SEPT- I. |911.

Patented Dec. 16, 1919.

5 SHEETS-SHEET 5.

j UemZZvr ZEW ITM/2265215 UNITED STA l onine.

ENVELOP-IVIAKING MACHIN E.

Specification of Letters Patent.

Patented ec. 16, 1919.

Application led September 7, 1917. Serial No. 190,138.

To all whom t may concern:

Be it known that I, HARRY Y. ARMSTRONG,

' a citizen of theAUnited States, and a resident of Springfield, in the county of Hampden and State of Massachusetts, have invented certain new and useful Improvements in Envelop-Making Machines; and I do hereby declaie that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification.

y This invention relates to improvements in envelop making machines and refers more specifically to a novel machine designed to continuously produce envelope from a continuous strip of paper.

The'inachine herein shown has been designed with more particular reference to the manufacture of the type of envelop shown in my pending application for U. S. Letters Patent, Serial N o. 163,871, filed April 23rd, 1917, wherein the envelop is made from. a single piece of paper, embracing equal dimension front and rear sections folded one upon the other and pasted at their end, flapless margins and open at one side, one of the sections being provided with a closing flap adapted to be folded flat upon the other section, and pasted thereto, if desired. The envelop also embodies additionally an inspection slit through one of its walls, whereby the contents of a. sealed envelop may be inspected by the postal authorities. l

The machine embraces mechanism to continuously fold a sheet or strip of paper to produce an envelop tube; to paste the layers of the tube together at longitudinal intervals to produce connected envelops, and to finally sever the folded, pasted tube into envelop lengths.

The object of the invention is to provide a 4machine which i`s so constructed and arranged as to receive a web or sheet from a roll and to rapidly and continuously fold the weband paste it at intervals and to sever the envelops therefrom while the paper is traveling continuously through the machine.

The invention consists in the combination and arrangement of the parts shown in the drawings and described in the specification and is pointed out in the appended claims.

In the drawings Figure 1 is a side elevation, partly broken away, of an enveloplinachine embodying my invention.

Fig. 2 is a plan View thereof, partly broken awa Fig. 3 is an enlarged section of the drawing, printing and severing rolls, on the line 3 3 of Fig. 2.

Fig. 4 is an enlarged sectional detail of the drawing rolls.

Fig. 5 is a viewsimilar to Fig. 4, showing the parts in changed positions.

Fig. 6 is a vertical section on the line 6-6 of Fig. 1.

Fig. 7 is a vertical section on the line 7-7 of Fig. 1.

Fig. 8 is a vertical section on the line 8 8 of Fig. 2.

sively acted upon to produce the finished envelop, shown in Fig. 16. M\

Fig. 17 is a longitudinal section of the envelop tube before the pasting operation.

Fig. 18 is a section of the envelop on the line 1818 of Fig. 17.

Fig. 19 illustrates the manner in which the web or sheet tends to roll or set after being drawn from the roll.

Fig. 2O is a section similar to Fig. 17, showing the result of reversely folding the web.

As shown iii the drawings, 10 designates the cast metal frame of the machinewhich is made hollow and is provided at its top with overhanging flanges 11. 12, 13 and 14 designate carriers for the several mating or interacting drawing, printing and severing rolls, which are mounted on the frame 10. Each carrier comprises laterally spaced upright standards 15 and a tie member 16 which extends between and connects the upper ends of said standards 15. Said carriers 12, 13 and 14 are attached to the flanged base by means of clamping members 18 (Fig. 6), which are attached to downturned flanges of the carrier bases by bolts 19 and extend underneath and in frictional contact with the overhanging flanges 11 of the bases. Through the connections described the carriers may be adjusted lengthwise of the base.

The carriers 12, 13 and 14, respectively, support upper and lower pairs of mating rolls 26-21, 22-23 and 24-25, the pairs being arranged one in advance of the other in the order specified. The rolls 20-21 are hereinafter designated as drawing rolls; the rolls 22-23 are designated as printing rolls and the rolls 24-25 are designated as severing rolls. As herein shown each of said rolls is of a circumference equal to twice the length of the envelops and they are geared to travel at equal speeds.

lThe drawing rolls 20-21 serve, in addition to drawing the strip of paper through the machine, as means for effecting the first or initial squeezing of the paste patches l between the margins of the envelop tube, said patches being applied to the sheet prior to passing between the drawing rolls. For this purpose the upper drawing` roll 20 is provided at diametrically opposite points with peripheral squeezing portions 28 disposed lengthwise of the roll, and at the sides of each squeezing portion the roll is provided with parallel relief grooves 29. The upper printing roll, when printing rolls are employed, is provided with spaces for two printing forms 30, 30, by which to print return cards, or other matter, on the envelops. The upper severing roll 24 is provided with diametrically opposed cutting knives 32 disposed lengthwise of the roll and fixed in longitudinal grooves in said roll with their edges extending beyond the periphery thereof. Said knives are adapted to enter longitudinal grooves 33 in the lower severing roll 25. The purpose of the knives is to cut or sever the individual envelops from the envelop tube E4, as will hereinafter more fully appear. At the sides of the cutting knives 32 the upper roll 24 is longitudinally grooved, tangentially to a circle concentric to the axis of the roll, to receive pairs of clamping bars 35 which are movable into and out of the grooves, and are normally projected from the face of the roll by backing springs 35. These bars bear upon the periphery of the lower roll 25 at the sides of the grooves 33 of said lower roll, when the knives are in position to-enter said grooves, and hold the envelop tube during the cutting operation. By 'reason of their movements in their grooves and their adjacency to the cutting edges of the knives, said bars serve to automatically clean the knives of paste which tends to adhere thereto, said knives severing the envelop tube through the paste patches, as will hereinafter more fully appear.

resten rlhe shafts 36-36, 37-37 and 38--38 of the respective drawing, printing and severing rolls are rotatively mounted in bearings in the standards 15. They are provided at one side of the machine with equal diameter meshing gears 40--40, 41-41 and 42-42 so that the mating rolls are driven at equal speeds. The lower shafts of the several pairs of rolls are provided with beveled gears 44, 45, 46 F ig. 2) which are driven at equal speeds from a power shaft 48 through a series of upright shafts 50, 51, 52 having at their ends beveled pinions which mesh respectively with the pinions 44, 45, and 46 and with other beveled pinions 55, 56, 57 that are mounted on the power shaft 48. Said beveled piuions 55, 56, 57 are locked to said shaft in any suitable manner, as by means of the set screws shown, whereby they may be adjusted longitudinally of the shaft to correspond to the adjustments of the units comprising the several carriers 12, 13 and 14 and their rolls.

Located at the one end of the base is a web supporting reel 60 that is supported on a shaft which is rotatively mounted in upright bearing plates 61, 61. 62, 63 designate upper and lower slitting and scoring rolls, the shafts of which are rotatively mounted in the bearingplates 61 in advance of the reel 60, with respect to the direction of travel of the sheet `W through the machine. The lower ro-ll is provided with spaced, circumferentially vcontinuous scoring knives 65 and near one end of the roll with two curved slitting knives 66 which are spaced at their ends and separated by longitudinal grooves 67 on opposite sides of the roll. The said rolls 62, 63 are of a circumference equal to the length of two envelope. The upper roll 62 is provided respectively opposite the scoring and slitting knives with circular grooves 66, 69 to receive said scoring and slitting knives.

70 designates a paste applying roll, the shaft of which is mounted in the bearing plates 61, and is provided near one end with oppositely disposed paste applying members 71. rThese paste applying members receive paste from a transfer roll 72, the shaft of which is rotatively mounted in the bearing plates 61, and said roll rotates partially submerged in a body of paste in a paste pot 73 that is supported on. one of the bearing plates 61.

The saidscoring and slitting rolls and the paste applying roll are geared to the power shaft 48 and are driven thereby `so that all said rolls rotate at equal speeds. Said power shaft is provided with a spur gear F5 (Figs. 2 to 7 and 9) which meshes with a spur gear 76 carried by the shaft of the paste applying` roll 70. The other end of the shaft of said paste applying roll is provided with a spur gear 77, which meshes with a gear 78 carried by the shaft of the paste transfer roll 72. Said gear'n77 also meshes with a spur gear 7 9 on the adjacent end of the shaft of the upper slitting and scoring roll 62 and the gear 79 meshes with a spur gear 80 of equal diameter on the shaft of the lower slitting and scoring roll 63. This driving arrangement effects equal peripheral speeds of the cutting and slitting rolls 62, 63 and the paste applying roll 70.

Located above the cutting and slitting and paste applying rolls is a guide roll 83,which is obliquely disposed atan angle of 45 to .the planes of the axes of said rolls, as herein shown. The shaft of said guide roll 83 is mounted in standards 84, 85 which rise from the bearing plates 61.

Arranged between the vsaid guide roll and the drawing rolls 20, 21 is a horizontal, V-shaped folding horn 87 and a symmetrically disposed, V-shaped folding form 88 disposed parallel to the foldin horn. Said folding horn lies within the orm and the tapered edge thereof is directed toward and is closely adjacent to the inner angle of said form. Said horn and form are supported at the larger end of the form on the standard 85 and are additionally supported on the carrier 12. rlhe horn 87 is widest at its rear end and terminates at its widest end short of the drawing rolls. It tapers toward its forward endand terminates short of the guide roll. The side members of the form 88 are separated by a wide angle at the front end of the form and taper toward the rear end thereof.

The web W from which the envelops are made is somewhat more than twice the width of the completed envelop E, shown in Fig. 14 and is folded upon itself along the score line e to produce the front and back walls E', E2 of the envelop, the dimensions of which are equal to each other (Figs. y15 and 16). The section of which the front wall E2 forms a part is continued beyond the side edge of the section E to form the closing flap E3 of the envelop.

In beginning the operation of producing envelops in the machine described, the web W is drawn off the reel and is threaded between the scoring and slittin rolls 62, 63, thence upwardly over the oblgiq roll 83,y within the form 88 and between the same and the horn 87, and is thence guided between the pairs of rolls 20-21', 22-23, and 24--25 to produce the envelop tube E, Whenf thus folded the section of the web which, inthe completed envelop, constitutes the fronts of the envelops'and the overhanging closing'flaps E3, overlies the section from which the backs of the envelops are formed. After the web has thus been threaded' through the machine,-

thedrawing rolls 20, 21|serve to draw the paper from the reel 60 between the slitting ue guide and scoring rolls. The slitting knives 66 serve produce the slits e2 which, inthe completed envelops, form the inspection slits through which the contents of the envelop may be withdrawn for inspection. The scoring knives produce the score line -e and the score line c, about which latter score line the closing flap e is folded. As the web passes the paste applying roll 70, paste patches P are applied by the members 71 to the adjacent face of the web near one side margin thereof. These paste patches are made of such width and are so disposed on the web that when the envelop tube is severed by the knives 32 along the dotted outlines e4, indicated in Figs. 11, 12 and 14, said knives split or divide the paste patches along their longitudinal 'centers vso as to leave narrow paste patches at and between the end margins of the front and rear" walls of the resultant envelops. The grooves 67 which separate the ends of thel sov slitting knives 66 are of such width and the roll 63 is so timed with respect to the travel of the paste applying members-71 of the roll 70 as to leave unslitted the -areas on the web at the points where the paste patches occur so that the inspection slits e2 extend only between the paste'patches.

The function of the oblique guiding roll 83 is to turn the web from a vertical path,

at which it leaves the slitting and scorlng roll 62, into a horizontal path Afor its reception in the forward open end ofthe folding 'i form 88, and the gradually tapering folding form coperates with the tapered folding horn 87 to transversely fold the web to produce the folded envelop tube E4. The V-shaped form 88 coperates.v with the'interior tapered folding horn 87 to continuously fold the web transversely upon itself along the'score line e prior to the passing of the folded web between the drawing rolls The timing of the drawing and pressing rolls 20, 21 is such, with respect to. that of the paste applying roll 70, that the paste patches P applied to the web, and which when the web'is folded into the tube appear on the inner or upper side of the lowermost layer of said tube, that saidpaste patches are brought into register with the squeezingv areas 28 of the upper roll 20 when said squeezing areas are in coperation with the lower roll 21. The transverse width of said squeezing areas 28 are limited by the pres.

ence olfthe relief grooves 29 'so that the squeezing action of the roll on the superimposed layers of the envelop tube and the interposed paste is so limited as to avoidsun- Y due spreading the paste, as to width, which would occur if the upper and lower rolls were circumferentially continuous. As the envelop tube passes between the printing rolls, if the latter be employed, the upper rolls 2e, 25 the severing knives or blades 32 are brought into contact with the envelop tube along theindicatcd lines c4 as said knives are brought into register with the grooves 33 of the lower roll 25, and said knives or blades 32 act to sever the envelop tube along said. lines e4 and centrally through the paste patches P. When saidv severing knives 32 are thus brought into cooperative relation with the grooves 33 of the lower roll 25, the clamping bars 35 are pressed upon the face of said lower roll 25 at the sides of the grooves 33 and co-act with said lower roll 25 to clamp or hold the envelop tube while being severed by the blades 32. T he clamping pressure exerted by the bars 35 is a yielding pressure due to the backing springs 35. The movement of said clamping bars 35 relatively to the cutting edges of the severing blades 32 serve to prevent'the accumulation of paste on said blades due to the passage of the blades through the paste patches. The severing roll 2e is provided at the sides of the knives 32 and associated clamping bars 35 with relief grooves 352 which serve in a manner similar to the grooves 29 of the drawing roll 20, to relieve squeezing pressure on the paste patches.

The severed envelope` are delivered from the severing rolls 24e, 25 between the proximate laps of upper and lower drying belts 95, 96 trained about upper and lower pairs of pulleys 97, 98, respectively, (the inner pulleys or those adjacent to the severing rolls only being shown). r1`he said drying belts may be made as long as expedient to A insure the drying of the paste between the end margins of the front and rear walls of the envelope. l/Vhile passing between the drying belts the extended closing flap E3 passes over a paste applying roll 100 and beneath a co-acting presser roll 101 by which to apply to the closing flap a longitudinal paste patch c5, if the envelop is to be a sealed envelop. Otherwise the aste patches are omitted from said iiaps. he paste applying roll 100 rotates partially submerged in a body of paste contained in a paste pot 103 that is supported by a bracket 104 l(Fig. l) which rises from the base 10; said bracket 104 constituting also supporting bearings for the shafts of the rolls 97, 98 and the upper presser roll or disk 101. rlhe shaft of the pulley 98 is driven from the shaft of the adjacent severing roll 42 by a sprocket chain 106 trained about sprocket pulleys on neaaeii said shafts, and the paste'appiying disk 100 is driven from the pulley 98 through the medium of a sprocket chain or belt 107, trained about sprocket wheels on the shaft of said pulley 98 and of the disk 100. The belt pulley 97 and the pressure disk 101 may be driven by friction from the parts below, cr may be geared to be positively driven, as found most convenient or desirable.

From an inspection of Fig. 1 of the. drawing, it will be noted that the web is so guided from the reel 60 to the folding, squeezing and severing mechanisms that the outer face of the web, as it leaves the reel, becomes the inner faces of the upper and lower layers of the transversely folded web to produce the envelop tube. By reason of the natural set of the web as it leaves the reel, which tends to cause the web, if released at its point of departure from the reel, to spring toward the reel (Fig. 19), the turning of said web so that the outer face thereof, as it leaves the reel, is folded inwardly, the walls of the severed envelops, cut transversely from the envelop tube, tends to spring inwardly toward their centers and outwardly at their ends, assuming the ends to be unsealed as shown in Figs. 17 and 18. Thus by reversing the web so that, in the longitudinal folding of the web, the outer face thereof, asl it leaves the reel, is brought together, the walls of the envelop, when the latter is completed tend to press inwardly toward each other as best shown in Fig. 17. 1f the web were turned about the guide roll 83 in an opposite direction so that the web be folded about the inner face thereof as it leaves the reel, the tendency of the walls would be to bulge a art, as indicated in Fig. 20.

So far as t ermanner of drawing the web from the roll and forming it into an envelop structure (whether an envelop tube to be thereafter severed into envelop lengths or an envelop structure of envelop length) is concerned, the web may be presented to the folding mechanism oppositely from that herein shown, which would have the effect of producing the bulging envelop shown in Fig. 20. This form of envelop, while presenting some objections when the envelop is used in the general manner of envelops, would not be objectionable and would present some advantages if the contents of the envelop were to be inserted by an automatic machine.

1 claim as my invention,-

1. An envelop making machine comprising means to transversely fold a paper web to produce an envelop tube, means to apply transverse paste patches to the web at longitudinally spaced intervals, and means to transversely sever the tube longitudinally through the paste patches to produce envelope.

2. An envelop making machine -comprising a rotative reel to support a paper web, means to transverselyfold the web to produce an envelop tube, means between the reel and folding means to apply transverse paste' patches to the web at longitudinally spaced intervals and means to transversely sever the tube through the paste patches to produce envelops.

3. An envelop making machine comprising means to support a roll of paper web, means to transversely fold the web to produce an envelop tube, means to apply transverse paste patches to the web at loiigitudinally spaced intervals, means tov press together the layers of the folded envelop tubewith the paste patches therebetween, and means to sever envelops from the tube.

4. An envelop making machine comprising means to support a roll of paper-web, means to transversely fold the web to produce an envelop tube, means to apply paste patches to the web at longitudinally' spaced intervals, a pair of drawing rolls between which the tube is drawn, one formed with a longitudinally disposed squeezing area and with an'king parallel relief grooves, and

means to sever envelops from said tube.

5. An envelop making machine comprising a reel for a paper web, means to apply vpaste patches to said web near one margin,

means to transversely fold said web to form an envelo tube, with the aste patches between t e layers of the tube., a pair of drawing and squeezing rolls between which the tube is passed, one of said rolls being provided with a limited paste squeezing area and at the sides thereofl with relief grooves and means to transversely sever the envelop tube to produce the envelops.

6. An envelop making machine comprising a reel to support a paper web, meansl to apply paste patches to the web at one side of and transversely to its longitudinal center, means to transversely fold said web into an envelop tube, drawing and paste squeezing rolls in advance of the folding means, and envelop severing and paste squeezing rolls int advance of the drawing and paste applying rolls.

7. An envelop making machine comprising a reel for a paper web, means to apply paste patches to said web near one margin, means to fold said web to forman envelop tube, with the paste patches between the layers of the tube, and with the margin of one of the layerseXtended beyond the adjacent margin of the other layerjto constitute, in the resultant envelops, closing flaps, means to transversely sever the tube to produce envelops, and means to applypaste to the margins of the extended layers.

8. An envelop making machine comprising a reel for a paper web, means to apply longitudinally spaced paste patches to said tube, a pair of drawing .and squeezing rolls between which the tube is passed, one of the rolls being provided with a limited paste squeezing area and at the side thereof with relief grooves, means to transversely sever the envelop tube to produc'ethe envelops and printing rolls intermediate the drawing and squeezing rolls and the severing means.

9. An envelop making machine comprising a reel for a paper web, means to apply longitudinally spaced paste patches to said web near one margin thereof, means to fold said web to'form an/envelop tube, with the paste patches between lthe layers of the tube, a pair of drawing and squeezing rolls between which the tube'is passed, one of the rolls being provided with a limited paste squeezing area and at the sides thereof with relief grooves, and a' severing roll for cutting envelops from said tube provided with a severing knife and atv the sides thereof with l.

paste squeezing areas and relief grooves. 10. An envelop making machine comprising means to support apaper web, means to' transversely fold'the web to produce an envelop tube, means to apply paste patches to the web which appear between the layers of the tube, a pair of drawing and squeezing VVrolls between which the tube is passed,-a

transversely fold the web to produce an envelop tube, means to apply paste patches to the web which appear between the layers of the tube, a pair of drawing and squeezing rolls between which the tube' is passed, a p air of severing rolls in advance of the drawing and squeezing rolls and supporting inea-ns for said pairs of rolls constructed to permit them to be adjustably positioned at dierent distances apart, combinedwith a power shaft, with gear mechanism for connecting said power shaft to said pairs of rolls, embracing gears mounted on and slidably adjustable along said power shaft.

12. An envelop making machine comprising a reel to sup-port a roll of paper we'b, scoring rolls between .which the web 1s passed, a guide roll obliquely disposed with respect to the axes of \rotation of the scoring rolls for guiding said sheet from one plane into another plane, folding means y'beyond the guide roll for transversely folding the web to produce an envelop tube, means for applying paste patches to the web, means for pressing the layers of the envelop tube together and upon the interposed paste patches, and means for severing envelops from the envelop tube.

13. An envelop making machinecomprising means to support a paper web, scoring rolls between which the web is passed, a guide roll obliquely disposed with respect to the axes of rotation ofthe scoring rolls for guiding said sheet from one plane into another plane, means for applying paste patches to the web, a tapered folding horn, with means for folding the sheet thereon, paste squeezing and web drawing means in advance of the horn and means to sever envelops from the foldedv and pasted web.

14. An envelop making machine comprising means to support a paper web, a pair of scoring rolls between which the web Y is passed, a guide roll obliquely disposed with respect to the axes of rotation of the scoring rolls for guiding said sheet from one plane into another plane, means for applying paste patches to the web, a folding form in advance of said guide roll having its sides angularly disposed with respect to each other, with the angle between said side largest at the entering end and the smallest at the rear end, a folding horn within said form which increases in width from the larger rear end of the form to the forward end thereof, web drawing and paste squeezing means in advance ofy said folding form and horn and means to sever envelops from the pasted and folded web.

15. In an envelop making machine, means for applying narrow, spaced paste patches transversely to a continuously moving web of paper, combined with means for drawing and forming said web into an envelop struc-- ture.

16. In an envelop making machine, means for applyingA narrow, spaced paste patches transversely to a continuously moving web of paper, combined with means for continuously forming the web into an envelop tube and other means for severing individual complete envelope from said tube.

17. In an envelop making machine, means for applying transverse paste patches at longitudinally separated intervals to a web of continuously moving paper, combined with means for drawing and forming the web into an envelop tube and severing means embracing a knife which is so timed with respect to the paste patch applying means as to sever the envelop tube transversely thereof longitudinally through said paste patches.

18. In an envelop'making machine, means for applying paste patches at longitudinally separated intervals transversely to a web of continuously moving paper, combined with means for drawing and forming the web into an envelop tube and severing means embracing a roll provided with a knife' which eX- tends beyond the periphery at the roll and ieeaeii with clamping areas at the sides of the knife flanked 'by relief grooves.

19. In an envelop making machine, means for applying paste patches at longitudinally separated intervals transversely to a web of continuously moving paper, combined with means for drawing and forming the web into an envelop tube and severing means embracing a roll provided with a knife which extends beyond the periphery of the roll, and paper clamping and knife-cleani-ng means at the sides of said knife, the roll being circumferentially continuous as a drawing roll between said paper clamping means.

20. In an envelop making machine, means for applying paste patches at longitudinally separated intervals transversely to a web o f continuously moving paper, combined with means for drawing and forming the web into an envelop tube, and severing means embracing a roll provided with a severing knife which extends beyond the periphery of the roll to transversely sever the tube medially of the paste patches, said roll being provided at thc sides of said knife with grooves, clamping bars seated in said grooves, with yielding means to normally extend them beyond the roll periphery, while permitting them to be pressed back into the grooves, said bars being so located with respect to the knife as .to constitute cleaning means for the knife.

21. In ,an envelop making machine, means for applying paste patches at longitudinally separated intervals transversely to a web of continuously moving paper, combined with means for drawing and forming the web into an envelop tube, and severing mea-ns embracing a roll provided with a severing knife which extends beyond the periphery of the roll, said roll being provided at the sides of said knife with grooves, clamping bars seated in said grooves, with yielding means to normally extend them beyond the roll periphery while permitting them to be pressed back into the grooves, said roll being provided at the sides of the clamping bars with relief grooves.

22. In an envelop making machine, means for applying paste patches at longitudinally separated intervals on a web of continuously moving paper, and means to fold the web into an envelop tube, combined with a pair of drawing and squeezing rolls between which the envelop tube is passed, one of said rolls being provided with a circumferentially limited squeezing area and at the sides thereof with relief grooves.

23. In an envelop making machine, a pair of drawing and squeezing rolls, one of which is provided with a longitudinally disposed circumferentially limited squeezing area, circumferentially coincident with the drawing periphery of said roll. v

24. ln an envelop making machine, a pair Y of drawing and squeezing rolls, one of which is provided with a longitudinally disposed, circumferentially limited squeezing area and at the sides of said squeezing area with parallel relief grooves depressed within the circumferential line of said roll.

25. In an envelop making machine, the combination with means to support a roll of paper, means to apply transverse paste patches thereto, and paste patch squeezing and paper drawing rolls, of a pair of severing rolls, one of which is provided with a longitudinal groove and the other of which is provided with a severing knife to enter said groove, the cutting edge of which knife projects beyond the periphery of the latter roll, and yielding clamping meansparallel to and at the sides of said cutting knife.

26. In an envelop making machine, the combination with means to support a roll of paper, means to apply transverse paste patches thereto,`and paste patch squeezing and paper drawing rolls, of a pair of severing rolls, one of whichl is provided with a longitudinal groove and the other of which is provided with a severing knife to enter said groove, the cutting edge of which knife projects beyond the periphery of the latter roll, said latter roll being provided at the sides of the knife with grooves, clamping bars movably seated in said grooves, and

. backing springs interposed between said bars and the bottoms ofI said grooves.

27. In an envelop making machine, means for applying transverse adhesive patches at longitudinallyseparate intervals to a web of continuously moving paper, with means for drawing and formi-ng the web into an envelop structure, and squeezing means for the paste patches comprising rolls having circumferentially limited squeezing areas to regulate the width of adhesion between the walls of the envelop structure while said structure is traveling continuously in one direction.

28. In an envelop making machine, means to feed an envelop blank, anda pair of severing rolls between which the blank passes, one of which rolls is provided with a longitudinal groove and the other of which .isl provided with a severing knife to enter said groove, yielding clamping members at the sides of said cutting knife, the latter roll being provided at the sides of the clamping members with longitudinal relief grooves, the peripheries of the rolls between the relief grooves being formed to constitute drawing surfaces for the blank.

29. In an envelop making machine, web moving means, a pair of severing rolls. one of which is provided with a longitudinal groove, and the other of which is providedwith a severing knife to enter said groove, said latter-.roll being provided at the sides of-said knife with recesses which converge for lon itudinally scoring the web, other means or folding the web along the longitudinal score line and for cutting envelops from the structure thus formed and means for applying paste patches to the web atl one side of the score line, said paste patches terminating short of the margin of the web and of the score line.

32. In an envelop making machine, means for longitudinally scoring a web along which the web is folded to produce an envelop tube, and means for applying 'pastel patches at longitudinally separated intervals, constructed to terminate said patches short of said score line and one of the 'side margins of the web, whereby when the paste patches are squeezed they do not iow beyond said margin and said score line.

33. In an'envelop making machine, means for forming an envelop tube from a continumeans to apply paste patches to the' web to paste the walls of the tube together, and envelop severing means to sever envelops from said tube through said gste patches. n

34. In an envelop ma 'ng machine, means for forming an envelop tube from a continuously moving web of paper, together with means to apply paste patches to the web to paste the walls of the tube together, and envelop severing means to sever envelops from said tube through said paste patches, combined with spring pressed clamping bars at the sides of said severing means. 35. In an envelop Amaking machine, means 'ously moving web of paper, together with to support a paper web, and means to transrected toward the inner angle fof said form,

the walls of said `form being separated by a wide angle at the entering end thereof and closely approaching each other at its opposlte end,

87. In an envelop making machine, means to support a paper web, and means to transversely fold the web to produce an envelop tube' comprising a V-shaped folding form and a folding horn of tapered cross section therein, with the narrower edge directed toward the inner angle of said form, the walls of said form being separated by a wide angle at the entering end thereof and closely approaching each other at its opposite end and said horn being widest at the latter end of said form and tapering toward the other end of said form.

38. A machine for making envelops comprising a reel for a roll of paper web, a pair of rolls, one of which is provided with slitting knives spaced by a groove in-said roll,

means to apply transverse paste patches to the web at intervals corresponding to the 'spacingI of said knives, means to draw and fold the web into an envelop tube, and means to sever complete envelops from said tube.

39. In an envelop making machine, a reel to support a` roll of paper web, with means to longitudinally score the web and other means to transversely fold the web along the score line to produce the envelop structure, combined with means for so directing the web to the folding means that the exterior face of the web as it leaves the reel becomes the inner faces of the envelop structure when it is folded.

4:0. ln an envelop making machine, a reelV to support a roll of paper web, drawing and forming means to produce an envelop tube, severing means to sever envelope therefrom,

means between the reel and drawing and forming means to applypaste to the web .on the outer surface of said web as it leaves the reel, and a guide roller between the reel and drawing and forming means arranged to direct the said outer face to said drawing and forming means so that said outer face of the web becomes, in the envelop tube, the inner faces of the member of the tube.

4l. In an envelop making machine, means to support a roll of paper web, drawing and forming means, embracingmeans to transversely fold the web along a longitudinally disposed fold line of the web, and means to so present the web to the folding means that the set of the web as it leaves the roll tends t flatten the envelop walls toward each other.

42. ln an envelop making machine, means to support a roll of paper web, drawing and forming means to transversely fold the web along a longitudinally disposed folded line thereof, and support and the drawing and forming means arranged to direct the outer face of the web as it leaves the roll support so that said outer face of the web, in the envelop, becomes the inner faces of the walls of the envelop.

ln testimony that I claim the foregoing as my invention l affix my signature in the presence of two witnesses this 28 day of August, A. l). 1917.

HARRY YARRINGTON ARMSTRONG.

Witnesses:

HARRY A. KNOX, LnLANn M. ALDRICH.

guide means between the rolly 

